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Microgeometrical tooth profile modification influencing efficiency of planetary hub gears

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journal contribution
posted on 10.08.2017, 12:41 by Ehsan Fatourehchi, Mahdi Mohammadpour, Paul King, Homer Rahnejat, G. Trimmer, B. Womersley, A. Williams
Planetary hub systems offer desired speed and torque variation with a lighter, compact and coaxial construction than the traditional gear trains. Generated friction between the mating teeth flanks of vehicular planetary hubs under varying load-speed conditions is one of the main sources of power loss. Modification of gear tooth geometry as well as controlling the contacting surface topography is the remedial action. The paper studies the effect of tooth crowning and tip relief upon system efficiency. It includes an analytical elastohydrodynamic analysis of elliptical point contact of crowned spur gear teeth. The analysis also includes the effect of direct contact of asperities on the opposing meshing surfaces. Tooth contact analysis (TCA) is used to obtain the contact footprint shape as well as contact kinematics and load distribution. A parametric study is carried out to observe the effect of gear teeth crowning and tip relief with different levels of surface finish upon the planetary hubs’ power loss.

Funding

The authors wish to express their gratitude to Innovate UK under the off-highway research initiative and JCB for the financial support extended to this research and development project.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

International Journal of Powertrains

Citation

FATOUREHCHI, E. ... et al, 2018. Microgeometrical tooth profile modification influencing efficiency of planetary hub gears. International Journal of Powertrains, 7 (1/2/3), pp.162-179.

Publisher

© Inderscience Enterprises Ltd.

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

24/07/2017

Publication date

2018

Notes

This paper was published in the journal International Journal of Powertrains and the definitive published version is available at https://doi.org/10.1504/IJPT.2018.10011451.

ISSN

1742-4267

eISSN

1742-4275

Language

en

Exports